Fire up your engine
Feeling sluggish affects how hard you can push your muscles because your central nervous system needs to be firing at full speed. So before you grab a dumb-bell, skip for 30 seconds, then do half a dozen body weight squat jumps and press-ups to get your body primed for the work ahead.

Create some space
Never stay seated on the equipment or machine you're using during your rest period, Stand up and walk away. If you create a mental and physical space between exercise and rest when you return to the bench or seat you'll be fully focused on what you are about to do.

Visualize the lift
Before the first set of each exercise. rehearse the moves in your mind. Think about the correct initial position and where you go from there until you reach the top of the move, then return to the start Not only will this mentally prepare you, it will also channel some aggression so you can hit the set hard.

Start super setting
Performing back-to-back exercises that works opposing muscle groups is a great way to push your muscles. For example, do a set of bench presses {chest) followed without rest by a set of one-arm rows (back). Testosterone levels start declining after 40 minutes of lifting, so work out within this time for the best muscle e-growing response